@r-tea

And what? That's exactly what he needs. MUI4 isn't incompatible to MUI 3.8 all out of the sudden, so its rare developer documentation would be void and no longer working.

The dev.guide and the class#? examples are all you need to get started properly with MUI coding. MUI's autodocs are also included in the SDK; and looking to os-include/libraries/mui.h might be useful too.

I know, because I started with exactly this information too and now I wrote quite a bunch MUI based applications and components already (need to count them someday). It's really all you need to get started. You just need to grasp how the subclassing and notification stuff works and then it's easy as stealing Haribos from a baby chimpanzee.